The two parts of Java and Maven are independent tutorials, and readers can skip them as needed
1. Install Java JDK on Windows
①上oracle官网（Oracle | Cloud Applications and Cloud Platform）
Resource->Java Downloads
Enter the java download interface. This article downloads Java8 JDK, so pull down the interface and slide to the Java8 download location.
②Choose Java8 windows 64-bit system version to download
Click in the order of the icons to download
③ After the installation package is downloaded, execute
Double-click the installation package to install
Enter the following interface, click Next
Change the jdk installation path , it is recommended not to put it on the drive C drive, so as not to occupy the drive disk space. click next
Click Next and wait for the installation to complete .
④Set Java environment variables
Click the windows icon in the lower left corner, and enter "environment variable" with the keyboard to open the environment variable editing window
Click on Environment Variables
Environment variables are divided into user variables and system variables, click New System Variables below
Add the JAVA_HOME system variable: the variable value is the installation path of jdk. This article is installed in D:\Java\jdk-1.8. Readers can modify their own installation path
Add the CLASSPATH system variable, the variable value is:
#注意：一定要把前面的.;拷上
.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar
Double-click to open the Path system variable
Newly add the following two variables
%JAVA_HOME%\bin
%JAVA_HOME%\binThe effect is shown in the figure below
After the addition is complete, press OK to save the modification .
⑤ Open a new CMD window to check whether the installation is successful
If the above effect is displayed, the installation is successful!
Two, Windows installation Maven environment
① Download the installation package from the Maven official website ( Maven – Download Apache Maven )
The download on windows is a .zip compressed package . binary does not contain maven source code. source contains the source code, and the editor can read the source code information. Choosing any of the above will not affect the use of maven. This article installs the maven3.6.3 binary version .
Pay attention to the version correspondence between maven and Java JDK . The corresponding information can be seen in Maven Releases History. Version incompatibility will affect the normal use of maven. The Java version must be greater than or equal to the Java version recommended by maven.
To install the historical version of 3.6.3, click Maven 3 archives under Other Releases to enter the following interface.
Select Maven3.6.3 Download 3.6.3->binaries Enter the binaries folder and download apache-maven-3.6.3-bin.zip.
② After the download is complete, extract it to the file path you want to place
Unzip this article to the D drive
③ After decompression, enter the corresponding installation path to find the conf folder, and modify the settings configuration file
The modified information is as follows:
Search for localRepository and add the location of the maven repository . This article is under the .m folder under the D drive, and the created repository folder acts as a maven warehouse. Readers can create a maven warehouse at any location other than the drive disk, and just add the warehouse path to the settings configuration file as shown in the figure.
#将标签中的路径改为你的仓库路径
<localRepository>D:\.m2\repository</localRepository>
Modify the mirror source, set the domestic Alibaba Cloud mirror, and copy the code below into the corresponding location according to the diagram.
<!-- 国内阿里云镜像配置 -->
<mirror>
<id>alimaven</id>
<mirrorOf>central</mirrorOf>
<name>aliyun maven</name>
<url>http://maven.aliyun.com/nexus/content/repositories/central/</url>
</mirror>
After modifying the settings configuration file, save the modification.
④ Configure maven environment variables
Open the environment variable editor, click the windows icon in the lower left corner, enter the environment variable, and open it.
Create a new MAVEN_HOME environment variable in the location of the system environment variable. The variable value is the installation location of maven, and it can be taken to the parent level of the bin folder.
Double-click to open the Path system variable
Add the following variables to the new
%MAVEN_HOME%\bin
The effect is shown in the figure below
After the addition is complete, press OK to save the modification .
⑤ Open a new CMD command window, enter
mvn -versionJust check whether the installation is successful. If the maven version information is displayed, the installation is successful.
Of course, this is the completion of the Maven installation. If you want to use the maven information you configured in the editor, you need to further configure it in the editor to ensure that the settings and warehouse paths you set can take effect.
⑤Intellij IDEA uses Maven
File->Settings to open the editing interface
search maven
Edit the corresponding information as shown below
After saving, you can use the maven project normally, run the maven project, and the corresponding required dependency packages will be downloaded in the maven warehouse.